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resources:eval:user-guides:ad-fmcomms5-ebz:hardware:configuration_options [09 Jul 2019 01:31]
Robin Getz add doc
resources:eval:user-guides:ad-fmcomms5-ebz:hardware:configuration_options [09 Jul 2019 01:51] (current)
Travis Collins [Rev C]
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 ==== Rev C ==== ==== Rev C ====
  
-The FMComms5 comes with the [[adi>​ADF5355]]. This on board reference normally flows through C331, and C332 (and C390 and R350 are DNI). To use the on-board ​ADF5355, just pick the right device tree on the SD Card.+The FMComms5 comes with the [[adi>​ADF5355]]. This onboard ​reference normally flows through C331, and C332 (and C390 and R350 are DNI). To use the onboard ​ADF5355, just pick the right device tree on the SD Card. With the necessary device tree, the [[resources/​tools-software/​linux-drivers/​iio-pll/​adf5355|ADF5355]] can be controlled like any IIO device to change the LO frequency of both transceivers.
  
-To bypass ​the the ADF5355 and use an external LO hardware modifications are necessary. Rotate C332 by 90 degrees, so it goes on the pad of the C390 and remove C331 placing R350. In this configuration an external reference clock can be injected into J302. The level of the external reference should be ensured to not exceed the [[adi>​HMC744LC3]] input conditions, and it will still be used to distribute the reference clock to the two AD9361s.+To bypass the ADF5355 and use an external LOhardware modifications are necessary. Rotate C332 by 90 degrees, so it goes on the pad of the C390 and remove C331 placing R350. In this configurationan external reference clock can be injected into J302. The level of the external reference should be ensured to not exceed the [[adi>​HMC744LC3]] input conditions, and it will still be used to distribute the reference clock to the two AD9361s.
  
-<WRAP important>​The hardware modifications (moving the cap, removing the cap, adding the resistor, is difficult since the components are tiny (0402 packages or 1 x 0.5 mm) and should be done by skill professionals only</​WRAP>​+<WRAP important>​The hardware modifications (moving the cap, removing the cap, adding the resistor, is difficult since the components are tiny (0402 packages or 1 x 0.5 mm) and should be done by skilled ​professionals only</​WRAP>​
  
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resources/eval/user-guides/ad-fmcomms5-ebz/hardware/configuration_options.1562628694.txt.gz · Last modified: 09 Jul 2019 01:31 by Robin Getz